NEW YORK (AP) — A look at the 10 biggest percentage decliners on New York Stock Exchange at the close of trading:

K12 Inc. fell 13.4 percent to $20.31.

Palo Alto Networks Inc. fell 7.2 percent to $66.60.

Engility Holdings Inc. fell 5.4 percent to $17.02.

Quaker Chemical Corp. fell 5.0 percent to $47.66.

Textainer Group Holdings Ltd. fell 5.0 percent to $33.44.

Rose Rock Midstream LP fell 4.2 percent to $31.40.

ServiceNow Inc. fell 4.0 percent to $33.01.

Sun Communities Inc. fell 4.0 percent to $44.05.

Aaron's Inc. fell 3.6 percent to $29.05.

Clear Channel Outdoor Holdings Inc. fell 3.5 percent to $5.19.